Yesterday I suddenly became very flush, my face and ears felt like they were on fire, shortly after I became dizzy, lightheaded, and very sweaty. Within a few minutes of feeling lightheaded my arms and hands began shaking uncontrollably and I lost the ability to speak normally, the only words I could speak were met with an extreme stutter. Leading up to this I had a burning pain in my upper abdomen/lower rib cage area, as well as, a sharp pain in my mid to lower back on my right and left sides. There is still some burning in my abdomen today. What could be the cause behind this?